899241997 has 8 divisors (see below), whose sum is σ = 903492216. Its totient is φ = 894999552.

The previous prime is 899241991. The next prime is 899242031. The reversal of 899241997 is 799142998.

It can be written as a sum of positive squares in 4 ways, for example, as 389430756 + 509811241 = 19734^2 + 22579^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-899241997 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (899241991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 469113 + ... + 471025.

It is an arithmetic number, because the mean of its divisors is an integer number (112936527).

Almost surely, 2^899241997 is an apocalyptic number.

It is an amenable number.

899241997 is a deficient number, since it is larger than the sum of its proper divisors (4250219).

899241997 is a wasteful number, since it uses less digits than its factorization.

899241997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3887.

The product of its digits is 2939328, while the sum is 58.

The square root of 899241997 is about 29987.3639555063. The cubic root of 899241997 is about 965.2182551962.

The spelling of 899241997 in words is "eight hundred ninety-nine million, two hundred forty-one thousand, nine hundred ninety-seven".